Caoutchouc substance and process of making same.



WTED STATES PATENT @FFTQE.

CARL HAEBIES, 0F KIEL, GERMANY, ASSIGNOR TO FARIBENFABRIKEN VORM. FRIEDR.

BAYER 85 60., OF ELIBEBFELD, GERMANY, A. CORPQBIATION OF GERMANY.

CAO'UTCHOUC SUBSTANCE AND PROCESS OF MAKING SAME.

No Drawing.

Specification of Letters Patent.

Application filed February 24, 1913. Serial No. 750,235.

Patented Sept. 16,1913.

To all whom it may concern:

Be it known that I, CARL HARRIES, professor of chemistry, doctor of philosophy, citizen of the German Empire, residing at Kiel, Germany, have invented new and useful Improvements in C'aoutc'houc' Substances and Processes of Making Same, of which the following is a specification.

I have made the surprising discover that the alkali-forming metals, namely, t e alkali and alkaline earth metals, both in an isolated state and in the form of their mixtures, alloys and amalgams, are capable of converting isoprene into a new caoutchouc substance.

This application is a division of my application vember 4, 1911.

In order to illustrate the new process more full the following example is given, the parts eing by weight: 3 parts of sodium wire prepared in the usual way are pressed into 100 parts of isoprene having the formula:

H: The autoclave is closed and it is heated to 36 C. durin six weeks. The sodium is then destroye by alcohol or water and the caoutchouc substance which has been formed is rolled into sheets. Instead of sodium, calcium, potassilun, lithium or mixtures of these metals such as calcium-sodium and instead ofsodium amalgam other amalgams such as ammonium amalgam, etc., may be used. These metals, whether used in an isolated condition" alone or in the form of mixtures or alloys or amalgams, are all embraced .within the generic term,-alka1iforming metals. 7

The new caoutchouc substance is a whitish substance soluble in benzene. .It is free erial Number 658,536 filed No from protein substances which are always contained in the natural 'caoutchouc and play an important part in it with regard to the elasticity of the natural caoutchouc. It forms a mixture of a mono-ozonid and a diozonid being a thick oil, which detonates when heated, and brom addition products. It is in the vulcanized form a grayish, non adhesive substance, and the ozoni'd's of which on decomposition with water do not show the pyrrol test or show it only very weakly.

I claim 1. The process of producing a caoutchouc substance which comprises subjecting isoprene to the action of an alkali-forming metal, substantially as described. v

2. The process of producing a caoutchouc substance which comprises subjecting isoprene to the action of an alkali metal, substantially as described.

3. The process of producing a caoutchouc substance which comprises subjecting isoprene to the action of sodium, substantially as described.

4. New caoutchoucsubstance obtained by polymerization of isoprene which is characterized by being a whitish substance soluhis in benzene, being free from protein substances and forming a mixture of a monoozonid and a diozonid being a thick oil, which detonates when heated, and brom addition products, and in the vulcanized form is a whitish substance which is not adhesive, and the ozonids of which on decomposition with water do not show the pyrrol test or show it only very weakly, substantially as "described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing 

